一、前言目前,对车辆的舒适性(包括车内环境)从根本上重新作了探讨。为了减小车内噪声,调查和研究了既有线路的车辆以及新干线车辆各部分的隔声性能;客室内的吸声性能;运行时的噪声特性以及车辆地板的隔声性能(声透射损失)等。该项研究包括调查现车的噪声主要来源和了解噪声传入车内的途径,以便采取有效措施,抑制噪声源,防止噪声传入车内。最近,为了搞清楚噪声传入车内之途径,试用了一种新型测定方法。下面以新干线车辆为例,就车内噪声的特点和实例作一介绍。二、客车噪声的来源对于200系新干线电动车停车或低速运行时的空调装置、风机和加速运行时的电机 First, the preface At present, the comfort of the vehicle (including the car environment) fundamentally re-explored. In order to reduce the noise inside the vehicle, the sound insulation performance of vehicles in existing lines and Shinkansen vehicles was investigated and studied; the sound absorption performance in the passenger compartment; the noise characteristics during operation and the sound insulation performance of the vehicle floor (acoustic transmission loss )Wait. The study included the investigation of the main sources of noise in vehicles and the ways in which noise was introduced into the vehicle in order to take effective measures to suppress noise sources and prevent noise from entering the vehicle. Recently, in order to clarify the way of noise into the car, try a new measurement method. The following Shinkansen vehicles, for example, on the characteristics and examples of noise inside the car to make an introduction. Second, the source of bus noise For the 200 Series Shinkansen electric car parking or low-speed operation of air-conditioning installations, fans and accelerating operation of the motor